How can I tell if my cat is pregnant?

The earliest visible sign is usually "pinking up" — the nipples enlarge and turn pink — around 16 to 20 days after mating.

When can a vet tell how many kittens?

A veterinarian can often palpate the abdomen from around 2.5 weeks, though counting is more accurate later via ultrasound or X-ray.

Can a cat get pregnant while nursing?

Yes. Cats are seasonally polyestrous and can come back into heat and conceive again even while still nursing a litter.

What is the gestation period of a cat?

The gestation period — how long are cats pregnant — is 63 to 65 days, divided into three trimesters of roughly 20 days each.

Cat Pregnancy Calculator

How Long Are Cats Pregnant? Cat Pregnancy Calculator & Timeline

Enter the mating date — or check off the signs you've noticed — to estimate the due date and current week.

Mating date

Estimates only — confirm pregnancy and due dates with a veterinarian.

How long are cats pregnant?

A cat's pregnancy (gestation period) lasts 63 to 65 days — about 9 weeks, or roughly 2 months. It's commonly divided into three trimesters of about 20 days each. This answers how long is a cat pregnant, the typical cat gestation period, and average cat pregnancy length — they all refer to the same 63–65 day window.

Cat Pregnancy Timeline

Week-by-week milestones during a typical cat pregnancy.

Cat pregnancy week-by-week timeline
Week	Milestone	Description
1	Fertilization	Mating occurs; fertilization happens within days. No visible signs yet.
2	Implantation	Embryos implant in the uterus. Still no outward signs in most cats.
3	Pinking up	Nipples enlarge and turn pink ("pinking up") — usually the earliest visible sign, around day 16–20.
4	Morning sickness	Mild appetite changes or vomiting can appear, similar to morning sickness.
5	Weight gain begins	Abdomen starts to thicken slightly; appetite typically increases.
6	Skeleton visible on X-ray	Kitten skeletons calcify enough to be seen on an X-ray.
7	Visible belly & nesting	Belly is clearly enlarged; the queen may start nesting behavior.
8	Fetal movement	Kitten movement may be felt or seen; mammary glands enlarge further for nursing.
9	Due date	Delivery is imminent (day 63–65). Most cats give birth within 6 hours once labor starts.

How to Tell If a Cat Is Pregnant

Signs typically appear in this order:

Pinking up — nipples enlarge and turn pink, around 16–20 days (the earliest, most reliable home sign).
Morning sickness — mild vomiting or appetite changes around week 4.
Abdominal enlargement — a visibly bigger belly later in pregnancy.
Behavior changes — often becoming more affectionate or calmer.
Nesting — seeking out quiet, secluded spots around week 7.

How Far Along Is My Cat?

Veterinary methods can pinpoint the stage more precisely than home signs alone:

~2.5 weeks: a vet may be able to palpate (feel) the developing fetuses.
3–4 weeks: ultrasound can detect heartbeats.
6 weeks: X-ray can show calcified kitten skeletons and help count the litter.

How Many Kittens Can a Cat Have?

A cat can have between 1 and 9 kittens in a single litter, with the average around 4. Litter size depends mostly on the mother's age — first-time mothers tend to have smaller litters — as well as breed and nutrition; Siamese and other oriental breeds often have larger litters. Keep in mind that litter size does not change how long are cats pregnant: the 63-to-65-day gestation period stays the same no matter how many kittens she is carrying.

Caring for a Pregnant Cat

During the roughly nine weeks of pregnancy, a queen typically needs more food — many vets recommend switching to a calorie-dense kitten-formula diet partway through, once you know how long are cats pregnant and can time the switch to the second trimester. Set up a quiet, secluded nesting box a week or two before the due date and keep other pets away from that space. Avoid unnecessary medications or vaccines during pregnancy unless a veterinarian approves them, and call a vet right away if labor lasts more than a few hours without a kitten arriving.

FAQ

How long are cats pregnant?: A cat's pregnancy (gestation period) lasts 63 to 65 days — about 9 weeks, or roughly 2 months.
How can I tell if my cat is pregnant?: The earliest visible sign is usually "pinking up" — the nipples enlarge and turn pink — around 16 to 20 days after mating.
How many kittens can a cat have?: A litter is typically 1 to 9 kittens, averaging around 4 kittens per litter.
When can a vet tell how many kittens?: A veterinarian can often palpate the abdomen from around 2.5 weeks, though counting is more accurate later via ultrasound or X-ray.
Can a cat get pregnant while nursing?: Yes. Cats are seasonally polyestrous and can come back into heat and conceive again even while still nursing a litter.
What is the gestation period of a cat?: The gestation period — how long are cats pregnant — is 63 to 65 days, divided into three trimesters of roughly 20 days each.